<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
   section{
     width: 80%;
     margin: 0 auto;
     display: flex;
     height: 200px;
     background-color: darkcyan;
     align-items: center;
   }
   div:nth-child(1){
     align-self: flex-end;
   }
</style>
<body>
  <section>
    <div>1</div>
    <div>2</div>
    <div>3</div>
  </section>
</body>
</html>